MALICIOUS — normal_5ff639b942443.pdf

MALICIOUS — normal_5ff639b942443.pdf is a pdf sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (80/100). 4 of 53 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

• SHA-256: 50aee6be725419e14436f8eebbda36ed0dfaef2838b7509183e2ee5978752ceb
• SHA-1: 6429fbdc902515810771281f8f8ffa220d341c1c
• MD5: d2a61b0127849e658fc2155f37bf7c03
• ssdeep: 1536:HgnmoZgd7/rom5yZ423q5hvuc1tq3+OWZq4w4KWZaco9zQoz:EmoZgBom5yO8qfQ+OuqL4r+3
• TLSH: T13937D0F36097DC8C66D18F077DAA043CA494DB9830276B5058CAFA6CC4BCABC2E55A51
• Submitted as: normal_5ff639b942443.pdf
• File type: pdf · Size: 71428 bytes
• Verdict: malicious (80/100)

Detections (4 of 53 engines)

• MalwareAnalyser heuristics (entropy/packer): high-entropy-blob
• Emsisoft (Emergency Kit): PDF.Spam.Heur.1
• Trellix Stinger (McAfee): PDF/Phish-FAB!D2A61B012784
• Kaspersky (KVRT): HEUR:Hoax.PDF.Phish.gen

MITRE ATT&CK

• T1112
• T1105
• T1566.002

Why this verdict

The malicious score of 80/100 is the fusion of 7 weighted signals:

• Embedded link rated malicious by URL analysis: https://static.s123-cdn-static.com/uploads/4477138/normal_5ff63615e43b6.pdf - network signal, weight 0.70, confidence 0.80
• Embedded network infrastructure: https://cctraff.ru/123?utm_term=cube+root+worksheets+grade+8, https://static.s123-cdn-static.com/uploads/4477138/normal_5ff63615e43b6.pdf, https://cdn-cms.f-static.net/uploads/4498971/normal_5fae7cb3e8157.pdf - static signal, weight 0.35, confidence 0.60
• Document active content: uri-action - static signal, weight 0.30, confidence 0.60
• Packing/obfuscation: high-entropy-blob - static signal, weight 0.25, confidence 0.55
• Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90
• Contacted 8 external host(s) at runtime - network signal, weight 0.12, confidence 0.55
• Extracted generic config (8 C2) (generic/advisory) - engine signal, weight 0.15, confidence 0.30

Dynamic analysis (windows)

9678 behavior events · 1 ATT&CK techniques · 3 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• searchapp.bundleassets.example
• inference.location.live.net
• staging.to-do.officeppe.com
• teams.cloud.microsoft
• outlook.office.com
• 250.255.255.239.in-addr.arpa
• b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 3.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 252.0.0.224.in-addr.arpa
• desktop-hsgcbep
• ntp.ubuntu.com
• 255.255.254.169.in-addr.arpa
• 251.0.0.224.in-addr.arpa
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

Dropped files

• C:\Users\analyst\AppData\Local\SumatraPDF\SumatraPDF-settings.txt - af1e20aab1e6dceb0ea6b534509708bb552f8f24c379ae01f1b550a6ae99a2f9
• C:\Users\analyst\AppData\Local\SumatraPDF\sumatrapdfcache\e27d7489e1cf88dc6efe7bb1371e2f82.png - 83e052411f1694e8d8cdd6b6448915334ba131e8154061a6da1aa1f941fa3568
• root_.cache_dconf_user - 96a296d224f285c67bee93c30f8a309157f0daa35dc5b87e410b78630a09cfc7

Embedded URLs

• https://cctraff.ru/123?utm_term=cube+root+worksheets+grade+8
• https://static.s123-cdn-static.com/uploads/4477138/normal_5ff63615e43b6.pdf
• https://s3.amazonaws.com/pulavokaxe/appeal_letter_format_for_reconsideration.pdf
• https://cdn-cms.f-static.net/uploads/4498971/normal_5fae7cb3e8157.pdf
• https://static.s123-cdn-static.com/uploads/4443292/normal_5fdf58c437b20.pdf
• https://wojegapemepuwa.weebly.com/uploads/1/3/4/0/134096127/rilofutit.pdf
• https://s3.amazonaws.com/vebenok/oreilly_python_for_data_analysis.pdf
• https://uploads.strikinglycdn.com/files/6f54ccb8-a267-4b04-bd2a-5b0c8ccd5eef/sojewuva.pdf
• https://worojuwoxalo.weebly.com/uploads/1/3/0/8/130814432/1359e5193471e.pdf
• https://s3.amazonaws.com/wekibik/s_p_global_1200_information_technology_etf.pdf
• https://static.s123-cdn-static.com/uploads/4483842/normal_5fe0404093549.pdf
• https://s3.amazonaws.com/dozuga/homophones_in_spanish_worksheets.pdf
• http://www.w3.org/1999/02/22-rdf-syntax-ns#
• http://purl.org/dc/elements/1.1/
• http://ns.adobe.com/pdf/1.3/
• http://ns.adobe.com/xap/1.0/
• http://ns.adobe.com/xap/1.0/mm/
• http://ns.adobe.com/xap/1.0/rights/
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

Embedded domains

• cctraff.ru
• static.s123-cdn-static.com
• s3.amazonaws.com
• cdn-cms.f-static.net
• wojegapemepuwa.weebly.com
• uploads.strikinglycdn.com
• worojuwoxalo.weebly.com
• www.w3.org
• purl.org
• ns.adobe.com

Embedded IP addresses

• 74.179.77.204
• 72.145.35.113
• 20.184.175.13
• 20.184.175.11
• 52.110.12.48
• 4.230.171.124
• 52.123.128.14
• 162.159.36.2

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report